/****************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one   *
 * or more contributor license agreements.  See the NOTICE file *
 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
 * with the License.  You may obtain a copy of the License at   *
 *                                                              *
 *   http://www.apache.org/licenses/LICENSE-2.0                 *
 *                                                              *
 * Unless required by applicable law or agreed to in writing,   *
 * software distributed under the License is distributed on an  *
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
 * KIND, either express or implied.  See the License for the    *
 * specific language governing permissions and limitations      *
 * under the License.                                           *
 ****************************************************************/

package org.apache.james.util;

import java.util.Arrays;
import java.util.concurrent.CompletableFuture;
import java.util.function.Supplier;
import java.util.stream.Stream;

public class Runnables {
    public static void runParallel(Runnable... runnables) {
        Stream<Runnable> stream = Arrays.stream(runnables);
        runParrallelStream(stream);
    }

    public static void runParrallelStream(Stream<Runnable> stream) {
        FluentFutureStream.of(stream
                .map(runnable -> CompletableFuture.supplyAsync(toVoidSupplier(runnable))))
            .join();
    }

    private static Supplier<Void> toVoidSupplier(Runnable runnable) {
        return () -> {
            runnable.run();
            return null;
        };
    }
}
